We present measurements of Rs using the SLD at the SLC. The analyses use 2D and 3D impact parameter tags and a displaced 3D vertex tag which all exploit the small size and stability of the e+e-interaction point and the precision 3D CCD pixel vertex detector to achieve high b&tagging efficiencies and purities. The combined measurement yields Rb = 0.229 f 0.011 and is consistent with standard model predictions.PACS number(s): 13.38.Dg, 13.65.+i
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